Sound-amplifier phonograph.



No. 799,412. PATENTED SEPT. 12, 1905. R. B. SMITH.

SOUND AMPLIFIER PHONOGRAPH.

APPLICATION FILBD'APB. 19, 1905.

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UNITED STATES PATENT OFFICE.

RICHARD B. SMITH, OF DARLINGHURST, SYDNEY, NEW SOUTH WALES, AUSTRALIA.

SOUND-AMPLIFIER PHONOGRAPH.

Specification of Letters Patent.

Patented Sept. 12, 1905.

Application filed April 19, 1905. Serial No. 256,355.

To all whom, it may concern;

Be it known that I, RICHARD B. SMITH, a subject of the King of Great Britain, and a resident of Darlinghurst, Sydney, Colony of New South Wales, Australia, have invented a new and Improved Sound- Amplifier for Phonographs, of which the following is a full, clear, and exact description.

This invention relates to improvements in devices for amplifying sounds from phonographs or like machines, an object being to provide a reproducer comprising a plurality of diaphragms so arranged as to be acted upon synchronously, whereby the sounds from the several diaphragms will be so blended as to be emitted from the sound-horn as a single sound, and much more distinct than is possible with the ordinary reproducer.

I will describe a sound-amplifier for phonographs embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side-elevation of a sound-amplifier for phonographs with aportion of the casing removed. Fig. 2 is a sectional View of a portion thereof carrying the recordpoints. Fig. 3 is an end View thereof. Fig. 4 is a perspective View of one of the weights employed. Fig. 5 is a modification diagrammatically illustrated, and Fig. 6 shows another modification.

Referring to the drawings, 1 designates the casing, that may be cylindrical, as shown, or of any other desired form. In one end of the casing 1 is a holder 2, having a diaphragm 3, and in the opposite end is a holder 4, having a diaphragm 5. Arranged at right angles to the holders 3 4 is another holder 6, which extends through an opening in the casingwall and supports a diaphragm 7. The covers of the several diaphragm-holders are respectively provided with short tubes 8 9 10, from which branches are designed to lead to the sounding-horn of the phonograph.

Connected by means of posts 11 with the casing 1 is a base-plate 12, which is shown substantially in the form of a ring and supports in its lower portion cross-bars 13 14. The record-points for the three diaphragms are indicated at 15 16 17. The point 15 is toward the record-cylinder by means of a link 23, designed to engage with a hook 24. From the part of the point 15 extended inward from its downwardly-extended end a wire 25 extends into the casing 1. and connects one arm of an angle-lever 26, the other arm of said angle-lever having a link connection 27 with the diaphragm 3. The point 16 is mounted to swing in a frame 28, pivoted to the crossbar 14, and from the end of the point 16 opposite its downwardly-turned end a wire or rod 29 extends to a connection with the diaphragm 7 and mounted to swing in the holder for this diaphragm 7 is a ring-like weight 30, which has arod connection 31 with the frame 28, and thus this weight serves to yieldingly hold the point 16 against the cylinder. The point 17 is mounted to swing in a frame 32, pivoted to lugs 33, and also pivotally connected to this frame is a weight 34:, which has swinging connection with the hook 23 or with the opposite-side of the plate 22. From the outer end of the point 17 a wire or rod 35 extends and connects with one arm of an angle-lever 36, the other arm of which has a a link connection 37 with the diaphragm 5.

In the operation the several points will be placed in the same channel or groove in the record-cylinder, so that when the cylinder is rapidly rotated the several points will be operated altogether, and consequently impart like vibratory motion to the several dia phragms. In Fig. 5 I have diagrammatically shown four diaphragm-holders 38 39 40 41, all having connections, substantially as before described, with the points.

Instead of the Weight 34, mounted as described, I may employ a weight 38, pivoted to one of the posts 11 and having link connection 39 with the frame 32, as indicated in Fig. 6.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A sound-amplifier for phonographs comprising a plurality of record-engaging points,

a plurality of diaphragms certain of said diaphragms being arranged with their faces parallel, and another one arranged at right angles thereto, a single casing in which the several diaphragms are arranged and connections between the engaging points and the diaphragms.

2. A sound-am plifier for phonographs comprising a plurality of record-engaging points arranged substantially in astraightline, a casing, a plurality of diaphragms supported in the casing, one beingarranged at right angles to the others connections between the diaphragms and the points, and means for yieldingly holding the points against the record.

3. Asound-amplifier for phonog'raphs comprising three record-engaging points arranged in a row, a casing, diaphragm-holders arranged in opposite walls of said casing, diaphragms in said holders, angle-levers having connection with the diaphragms, rods connecting said angle-levers with their actuatingpoints, a holder arranged in the cylinder at substantially right angles to the first-named holders,adiaphragrn in said last-named holder,

and a rod connection between said diaphragm and one of the points.

4. A sound-am plifier for phonographs,acasing, holders removably placed in opposite ends of said casing, a holder removably arranged in the upper portion of the casing at right angles to the first-named holders, diaphragms in the holders, record-engaging points arranged substantially in a straight line and weighted, angle-levers having their vertical portions connected to the end diaphragms, connections between the horizontally-disposed portions of said anglelevers and record-engaging points, and a connection between the horizontally-disposed diaphragm and the central record-engaging point.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RICHARD B. SMITH.

Witnesses:

JNO. M. BITTER, C. R.-FERGUSON. 

